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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In one dimensional flow, the flow

Takes place in one direction
Takes place in straight line
Takes place in curve
Is steady and uniform

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Hydraulics and Fluid Mechanics in ME
The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

None of these
Does not effect
Effects
Both A and B

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Hydraulics and Fluid Mechanics in ME
A one dimensional flow is one which

is steady uniform flow
takes place in straight lines
is uniform flow
involves zero transverse component of flow

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Hydraulics and Fluid Mechanics in ME
If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is

4
43924
1
2

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Hydraulics and Fluid Mechanics in ME
When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

1.84(L - 0.1nH)H5/2
1.84(L - nH)H2
1.84(L - 0.1nH)H3/2
1.84(L - nH)H3

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Hydraulics and Fluid Mechanics in ME
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by

Designing new impeller
Some other alterations in the impeller
Not possible
Trimming the impeller size to the required size by machining

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